Bathtub



FIG. 1 is a front and right side perspective view of a bathtub showing my new design;

FIG. 2 is a rear and left side perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a front elevation view thereof;

FIG. 5 is a left side elevation view thereof;

FIG. 6 is a rear elevation view thereof;

FIG. 7 is a sectional view thereof taken along line 7—7 of FIG. 4; and,

FIG. 8 is a detail of FIG. 7. 

The ornamental design for a bathtub, as shown and described. 